Unitus DSpaceThe DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material.http://http://dspace.unitus.it:802015-08-02T18:29:05Z2015-08-02T18:29:05ZBiomass estimates by satellite data and ground measurementsChirici, GherardoCorona, PiermariaMarchetti, MarcoTonti, DanielaTravaglini, Davidehttp://hdl.handle.net/2067/21512011-06-29T10:09:21Z2009-12-31T23:00:00ZTitle: Biomass estimates by satellite data and ground measurements
Authors: Chirici, Gherardo; Corona, Piermaria; Marchetti, Marco; Tonti, Daniela; Travaglini, Davide
Abstract: L'abstract è disponibile nel file allegato2009-12-31T23:00:00ZSviluppo di una procedura innovativa per la cubatura del volume della massa legnosa di fustaie di latifoglie mediante LiDARCorona, PiermariaChirici, GherardoLamonaca, AndreaTravaglini, DavideMason, FrancoMinari, EmmaMarchetti, MarcoMontaghi, Alessandrohttp://hdl.handle.net/2067/21482011-07-01T00:30:49Z2006-12-31T23:00:00ZTitle: Sviluppo di una procedura innovativa per la cubatura del volume della massa legnosa di fustaie di latifoglie mediante LiDAR
Authors: Corona, Piermaria; Chirici, Gherardo; Lamonaca, Andrea; Travaglini, Davide; Mason, Franco; Minari, Emma; Marchetti, Marco; Montaghi, Alessandro
Abstract: La tecnica di scansione aerea con strumentazione LiDAR (Light Detection and Ranging) è sempre
più presa in considerazione ai fini di analisi e monitoraggio degli attributi dendrometrici dei
popolamenti forestali, ma anche per stimare attributi complessi quali il volume della massa legnosa
e la biomassa legnosa. Il presente contributo propone una procedura innovativa per la stima del
volume di massa legnosa di soprassuoli forestali mediante elaborazione di dati LiDAR in ambiente
GIS, in particolare per i popolamenti a prevalenza di latifoglie dove i convenzionali metodi di stima
basati sulle misurazioni LiDAR dell’altezza dei singoli fusti arborei conducono in genere a risultati
relativamente insoddisfacenti.
Description: L'articolo è disponibile sul sito dell'editore http://www.asita.it2006-12-31T23:00:00ZConfronto di metodi parametrici e non-parametrici per la spazializzazione della provvigione legnosa tramite integrazione di misure a terra, dati telerilevati e informazioni ancillariBertini, RobertaChirici, GherardoCorona, PiermariaTravaglini, Davidehttp://hdl.handle.net/2067/20842011-06-03T00:30:37Z2006-12-31T23:00:00ZTitle: Confronto di metodi parametrici e non-parametrici per la spazializzazione della provvigione legnosa tramite integrazione di misure a terra, dati telerilevati e informazioni ancillari
Authors: Bertini, Roberta; Chirici, Gherardo; Corona, Piermaria; Travaglini, Davide
Abstract: The use of remotely sensed data for forest inventory and monitoring of natural resources is ever increasing. Distinctively, remotely sensed data, integrated with ancillary data, can be exploited for the spazialization of biophysical attributes measured by forest inventories or management plans. Such applications are based on the relationships between the considered attributes and the spectral information measured by multispectral satellite images. Operative applications are commonly based on parametric or, more frequently, non-parametric approaches. The final aim of the present contribution is the spazialization of forest standing volume of various tree species in a study site in northern Italy by parametric (multiregressive) and non-parametric algorithms (k-Nearest Neighbors). The project is based on field data measured in productive forest stands dominated by Abies alba Mill. and/or Picea abies L. in the Provincia Autonoma di Trento (eastern Alpine Region of Italy). Remotely sensed images were acquired by the Landsat 7 ETM+ sensor while ancillary information is given by the altitude obtained from DEM and the site fertility from the GIS of the management plans. The contribution compares spazialization performance of several operative configurations of the tested methods in order to provide guidelines for the operative application of such techniques on vast areas. The study results emphasize the higher suitability of the tested non-parametric methods.
Description: L'articolo è disponibile sul sito dell'editore www.sisef.it2006-12-31T23:00:00ZForestBIOTA data on deadwood monitoring in EuropeTravaglini, DavideBarbati, AnnaChirici, GherardoLombardi, FabioMarchetti, MarcoCorona, Piermariahttp://hdl.handle.net/2067/21142011-06-10T00:30:48Z2006-12-31T23:00:00ZTitle: ForestBIOTA data on deadwood monitoring in Europe
Authors: Travaglini, Davide; Barbati, Anna; Chirici, Gherardo; Lombardi, Fabio; Marchetti, Marco; Corona, Piermaria
Abstract: Deadwood is a key ecological factor in forest ecosystems. Its occurrence is fundamental since it represents a microhabitat for
hundreds of species of invertebrates, fungi, bryophytes, lichens, amphibians, small mammals and birds. In recent years,
deadwood has been recognized as a relevant indicator for the assessment and monitoring of forest biodiversity. In this paper
the methodology for surveying woody necromass proposed by the ForestBIOTA project under Regulation (EC) No 2152/
2003 (Forest Focus) is described. The amount of deadwood found on 91 Intensive Monitoring Level II plot of the EU and
ICP Forest condition monitoring programme range from 0 to 258 m3 ha71. In the examined areas, total deadwood volume
does not differ significantly among forest types, due to the high intra-type variability. On the other hand, its distribution
between coarse and fine necromass and among necromass components is highly dependent on forest types.
Description: L'articolo è disponibile sul sito dell'editore www.tandf.co.uk/journals/2006-12-31T23:00:00ZBackground, main results and conclusions from a test phase for biodiversity assessments on intensive forest monitoring plots in EuropeFisher, RichardGranke, OliverChirici, GherardoMeyer, PeterSeidling, WalterStrofer, SilviaCorona, PiermariaMarchetti, MarcoTravaglini, Davidehttp://hdl.handle.net/2067/20902011-06-07T00:30:54Z2008-12-31T23:00:00ZTitle: Background, main results and conclusions from a test phase for biodiversity assessments on intensive forest monitoring plots in Europe
Authors: Fisher, Richard; Granke, Oliver; Chirici, Gherardo; Meyer, Peter; Seidling, Walter; Strofer, Silvia; Corona, Piermaria; Marchetti, Marco; Travaglini, Davide
Abstract: The Forest Biodiversity Test phase Assessments (ForestBIOTA) project was carried out on 97 intensive monitoring plots located in 12 European countries. It aimed at the development and test implementation of monitoring methods for forest biodiversity across Europe. More specifically it covered the fields of (i) stand structure, (ii) forest deadwood, (iii) ground vegetation and (iv) epiphytic lichens. A forest type classification was applied in addition. The project took into account policy requirements stated by a number of political processes and institutions including the Convention on Biological Diversity, the Ministerial Conference for the Protection of Forests in Europe, the Environment for Europe Ministerial Conference and the European Union. Whereas detailed results of the assessments are presented in additional publications (Stofer et al. 2007, in prep, Meyer et al. 2007, submitted), this paper draws a number of general conclusions and gives recommendations for future development of forest biodiversity monitoring in Europe.2008-12-31T23:00:00ZForest ecotone survey by line intersect samplingCorona, PiermariaChirici, GherardoTravaglini, Davidehttp://hdl.handle.net/2067/20952011-06-07T00:30:54Z2003-12-31T23:00:00ZTitle: Forest ecotone survey by line intersect sampling
Authors: Corona, Piermaria; Chirici, Gherardo; Travaglini, Davide
Abstract: Given their ecological relevance, the survey of ecotones is of considerable interest in forest multiresource inventory. To this end, it is useful to set up survey procedures to provide efficient and reliable information about the length of such elements within the landscape mosaic. This note demonstrates a procedure based upon line intersect sampling on remotely sensed imagery. The estimate of ecotone length per unit area is obtained by visual interpretation of the changes from forest to other land use classes along each sampling line. The experimentation carried out in two test areas within forest landscapes of central Italy proves the operative soundness of the proposed procedure, which is more efficient than the classical approach by forest polygon delineation and perimeter mensuration in a GIS environment. Under the examined conditions, samples based on a moderately high number of lines characterized by relatively long length prove to be more efficient than those based on shorter survey units.
Description: L'articolo è disponibile sul sito dell'editore www.nrcresearchpress.com2003-12-31T23:00:00ZEstimation of growing stock of broadleaved forests by airborne laser scanningCorona, PiermariaLamonaca, AndreaChirici, GherardoTravaglini, DavideMarchetti, MarcoMinari, EmmaMontaghi, Alessandrohttp://hdl.handle.net/2067/21442011-06-28T00:30:46Z2007-12-31T23:00:00ZTitle: Estimation of growing stock of broadleaved forests by airborne laser scanning
Authors: Corona, Piermaria; Lamonaca, Andrea; Chirici, Gherardo; Travaglini, Davide; Marchetti, Marco; Minari, Emma; Montaghi, Alessandro
Abstract: Airborne laser scanning (ALS) is increasingly being proposed for surveying forest attributes. The objective of this paper is to present a new approach
for the estimation of growing stock based on ALS data. The approach is distinctively developed for broadleaved stands where conventional
methods for growing stock estimation based on ALS measurements of single tree heights frequently provide poor results. Theoretical background
and model-based statistical estimators are reported.2007-12-31T23:00:00ZArea-based assessment of forest standing volume by field measurements and airborne laser scanner dataBarbati, AnnaChirici, GherardoCorona, PiermariaMontaghi, AlessandroTravaglini, Davidehttp://hdl.handle.net/2067/21372011-06-14T00:30:55Z2008-12-31T23:00:00ZTitle: Area-based assessment of forest standing volume by field measurements and airborne laser scanner data
Authors: Barbati, Anna; Chirici, Gherardo; Corona, Piermaria; Montaghi, Alessandro; Travaglini, Davide
Abstract: Airborne laser scanning (ALS) is increasingly applied as a tool for extracting forest
inventory data. In recent years most applications for the assessment of forest
standing volume rely on a single tree recognition approach, which generally gives
satisfactory results in coniferous forests. The aim of this paper is to apply a rasterbased
approach for the assessment of forest standing volume based on field
measurements and a Digital Canopy Model (DCM) derived from ALS data. In
addition, we explore the potential of hot spot analysis of DCM data for automatic
forest gap detection, as a means to improve the accuracy of the estimation of forest
standing volume by traditional estimation methods.
Description: L'articolo è disponibile sul sito dell'editore www.tandf.co.uk/journals/2008-12-31T23:00:00ZDeadwood in forest stands close to old-growthness under Mediterranean conditions in the Italian PeninsulaCorona, PiermariaLombardi, FabioChirici, GherardoMarchetti, MarcoTognetti, RobertoLasserre, BrunoBarbati, AnnaFerrari, BarbaraDi Paolo, SilviaGiuliarelli, DiegoIovino, FrancescoNicolaci, AntoninoBianchi, LivioMaltoni, AlbertoTravaglini, Davidehttp://hdl.handle.net/2067/19022011-04-12T00:30:21Z2009-12-31T23:00:00ZTitle: Deadwood in forest stands close to old-growthness under Mediterranean conditions in the Italian Peninsula
Authors: Corona, Piermaria; Lombardi, Fabio; Chirici, Gherardo; Marchetti, Marco; Tognetti, Roberto; Lasserre, Bruno; Barbati, Anna; Ferrari, Barbara; Di Paolo, Silvia; Giuliarelli, Diego; Iovino, Francesco; Nicolaci, Antonino; Bianchi, Livio; Maltoni, Alberto; Travaglini, Davide
Abstract: Considering that indicators of old-growth features can vary across the European ecoregions, this paper provides some results to identify the distinctive traits of old-growth forests in the Mediterranean ecoregion. Deadwood occurrence as indicator of naturalness is investigated in some remote forest areas that have developed in absence of anthropogenic disturbance over the past few decades. Eleven study sites across the Italian peninsula were elected and records of deadwood were carried out in 1-ha size plots. Deadwood volume, deadwood types and decay stages were inventoried in the selected sites. The amounts of deadwood indicate a large variability among the investigated forest stands: the total volume ranged between 2 and 143 m3ha-1, with an average of 60 m3ha-1. Lying deadwood is the most abundant component of deadwood in the investigated forests, due to the natural mortality occurring in the stands in relation to the processes established in the last decades. On the contrary, stumps are the less represented type of deadwood in almost all the study areas. All the decay classes are present in each study site. The amount of deadwood in Southern Europe, even if lower than that reported for North and Central European countries, could have a different meaning due to the faster decay occurring in Mediterranean forest ecosystems. For this reason, old-growth features and the characteristics of each indicator should be framed and referred to well-defined climatic and biogeographic contexts. Distinctively, under the conditions here investigated, three main deadwood features prove to characterize forest stands close to old-growthness: a ratio of dead to living wood not lower than 10%; lying deadwood much more abundant than the standing one; large range of deadwood size and decay classes across all the deadwood components.2009-12-31T23:00:00ZAdvanced earth observation approach for multiscale forest ecosystem services modelling and mapping (MIMOSE)Chirici, GherardoSallustio, LorenzoVizzarri, MatteoMarchetti, MarcoBarbati, AnnaCorona, PiermariaTravaglini, DavideCullotta, SebastianoLafortezza, RaffaeleLombardi, Fabiohttp://hdl.handle.net/2067/25962014-04-28T23:05:06Z2013-12-31T23:00:00ZTitle: Advanced earth observation approach for multiscale forest ecosystem services modelling and mapping (MIMOSE)
Authors: Chirici, Gherardo; Sallustio, Lorenzo; Vizzarri, Matteo; Marchetti, Marco; Barbati, Anna; Corona, Piermaria; Travaglini, Davide; Cullotta, Sebastiano; Lafortezza, Raffaele; Lombardi, Fabio
Abstract: In the last decade ecosystem services (ES) have been proposed as a method for quantifying the multifunctional role of forest ecosystems.
Their spatial distribution on large areas is frequently limited by the lack of information, because field data collection with traditional methods
requires much effort in terms of time and cost. In this contribution we propose a methodology (namely, Multiscale Mapping of ecoSystem
services - MiMoSe) based on the integration of remotely sensed images and field observation to produce a wall-to-wall geodatabase of forest parcels
accompanied with several information useful as a basis for future trade-off analysis of different eS. Here, we present the application of the MiMoSe
approach to a study area of 443,758 hectares coincident with the administrative Molise region in Central italy. The procedure is based on a local
high resolution forest types map integrated with information on the main forest management approaches. through the non-parametric k-nearest
neighbors techniques, we produced a growing stock volume map integrating a local forest inventory with a multispectral satellite IRS LISS III
imagery. With the growing stock volume map we derived a forest age map for even-aged forest types. Later these information were used to
automatically create a vector forest parcels map by multidimensional image segmentation that were finally populated with a number of information
useful for ES spatial estimation. The contribution briefly introduces to the MIMOSE methodology presenting the preliminary results we achieved which
constitute the basis for a future implementation of ES modeling2013-12-31T23:00:00ZConversion of clearcut beech coppices into high forests with continuous cover: A case study in central ItalyCiancio, OrazioCorona, PiermariaLamonaca, AndreaPortoghesi, LuigiTravaglini, Davidehttp://hdl.handle.net/2067/20662011-05-03T00:35:33Z2005-12-31T23:00:00ZTitle: Conversion of clearcut beech coppices into high forests with continuous cover: A case study in central Italy
Authors: Ciancio, Orazio; Corona, Piermaria; Lamonaca, Andrea; Portoghesi, Luigi; Travaglini, Davide
Abstract: Converting coppices into high forests with continuous cover has often been established during the last decades as a management goal in hilly and mountainous Mediterranean areas to attenuate the negative effects that frequent clearcutting may have on soil, landscape and biodiversity conservation. The silvicultural tool usually adopted for this purpose is the gradual thinning of sprouts during the long span of time required to complete the conversion, that also allows the owner to keep harvesting some wood. This research compared the effects of various thinning intensities (three treatments plus control) on the stand growth and structure of a beech coppice with standards. The optimal density after thinning was assessed by expressing mean tree spacing as a function of main stand attributes like stand height and stand dbh. This system was preferred to the empirical evaluation of the percentage of basal area to be removed in order to give forest managers general reference guidelines to adapt to the varying environments of the Mediterranean mountains. Results confirmed that the positive effects of thinning on mean stem volume is due more to the higher diameter increment than to different height growth. The acceleration of crown growth in the thinned plots allowed canopy closure to be achieved 13 years after thinning. This reduced the negative effects of the opening of the stand overlayer and the elimination of most suppressed trees on soil protection. Under the conditions examined, the best thinning intensity proved to be a stand density 20% lower than normal prescribed by the yield tables elaborated for beech high forests in Central and Southern Italy.2005-12-31T23:00:00ZAspects of biological diversity in the CONECOFOR plots. V. Deadwood surveying experiments in alpine and mediterranean forest ecosystemsTravaglini, DavideMason, FrancoLopresti, MassimoLombardi, FabioMarchetti, MarcoChirici, GherardoCorona, Piermariahttp://hdl.handle.net/2067/21382011-06-17T00:30:43Z2005-12-31T23:00:00ZTitle: Aspects of biological diversity in the CONECOFOR plots. V. Deadwood surveying experiments in alpine and mediterranean forest ecosystems
Authors: Travaglini, Davide; Mason, Franco; Lopresti, Massimo; Lombardi, Fabio; Marchetti, Marco; Chirici, Gherardo; Corona, Piermaria
Abstract: In recent years, deadwood has become more and more considered as indicator in the assessment of the biodiversity and
naturalness of forest ecosystems. Its occurrence, in an appropriate proportion according to forest use, is fundamental for the maintenance of
biological diversity, since it represents a microhabitat for hundred of species of invertebrates, fungi, bryophytes, lichens, amphibians, small
mammals and birds. Having acknowledged its importance in forest coenoses, quantification of deadwood components in a given habitat,
in relation to forest type and type of management, becomes essential. In our study, different survey designs were tested and compared for
assessing deadwood components: stumps, lying coarse wood pieces and lying fine wood pieces. As expected, the experiments carried
out show that sample-based estimates of ground necromass tend to be more accurate as the quantity of necromass present within the
area to be surveyed and the size of the sampling units increase. The adoption of four 7-m-radius subplots in a systematic configuration
has proved to be a good compromise between accuracy and survey costs for volume estimation of stumps and lying wood pieces within
the examined experimental forest stand plot.; Esperienze sperimentali di rilevamento della necromassa legnosa in cenosi forestali alpine e mediterranee. Negli ultimi
anni, il legno morto è sempre più considerato un indicatore per valutare la biodiversità e la naturalità di un sistema forestale. La sua
presenza, nelle opportune proporzioni commisurate anche alle finalità di coltivazione della foresta, è fondamentale per il mantenimento
della diversità biologica, rappresentando il microhabitat per centinaia di specie di invertebrati, funghi, briofite, licheni, anfibi, piccoli mammiferi
ed uccelli. Riconosciuta l’importanza della necromassa legnosa nelle cenosi forestali, diviene fondamentale la sua quantificazione
in un determinato ambiente, distinguendone la presenza in funzione dei tipi forestali e delle forme di gestione. A tal fine, in questo studio
sono state sperimentate e valutate comparativamente differenti strategie di rilievo di alcune componenti della necromassa legnosa a
terra: ceppaie, rami grossi e rami fini. Come atteso, la sperimentazione mostra che la stima della necromassa grossolana e fine a terra
tende ad essere più accurata all’aumentare della quantità di legno morto presente e all’aumentare delle dimensioni della superficie di
rilevamento. Nelle condizioni esaminate, l’adozione di quattro subplots di 7 m di raggio in configurazione sistematica è risultato un buon
compromesso tra accuratezza e costi di indagine per la stima del volume delle ceppaie e del legno morto a terra.2005-12-31T23:00:00ZStand structure attributes in potential Old-Growth Forests in the Apennines, ItalyCalamini, GianfrancoMaltoni, AlbertoTravaglini, DavideIovino, FrancescoNicolaci, AntoninoMenguzzato, GiulianoCorona, PiermariaFerrari, BarbaraDi Santo, DanieleChirici, GherardoLombardi, Fabiohttp://hdl.handle.net/2067/22132011-11-15T00:05:39Z2010-12-31T23:00:00ZTitle: Stand structure attributes in potential Old-Growth Forests in the Apennines, Italy
Authors: Calamini, Gianfranco; Maltoni, Alberto; Travaglini, Davide; Iovino, Francesco; Nicolaci, Antonino; Menguzzato, Giuliano; Corona, Piermaria; Ferrari, Barbara; Di Santo, Daniele; Chirici, Gherardo; Lombardi, Fabio
Abstract: The aim of this paper is to provide early feedback on stand structure attributes in Italian Apennines
forests that could be considered Old Growth Forests in the Mediterranean Eco-Region. Few data are
nowadays available relating to this Region. 10 forest reserves across the Apennines were selected and a
census of trees and structural parameters was conducted in permanent plots (0.16-1.0 ha), one plot for
each selected forest stand. Dimensional and structural characters indicate a large variability among the
investigated forest stands.
The considered parameters are compared with those reported for other European countries. Old
growth features and characteristics of each indicator should be revised and referred to the particular
climatic and biogeographic context. The chosen forest study sites are to be considered old if related to
common Apennine stands but, in some cases, their development stage is not so close to “truly” Old
Growth Forest. Permanent plots allow future investigations on dynamic processes leading to real Old
Growth Mediterranean Forests in Italian Apennines.2010-12-31T23:00:00ZTowards a sampling strategy for the assessment of forest condition at European level: combining country estimatesTravaglini, DavideFattorini, LorenzoBarbati, AnnaBottalico, FrancescaCorona, PiermariaFerretti, MarcoChirici, Gherardohttp://hdl.handle.net/2067/26262014-08-25T23:05:28Z2012-12-31T23:00:00ZTitle: Towards a sampling strategy for the assessment of forest condition at European level: combining country estimates
Authors: Travaglini, Davide; Fattorini, Lorenzo; Barbati, Anna; Bottalico, Francesca; Corona, Piermaria; Ferretti, Marco; Chirici, Gherardo
Abstract: A correct characterization of the status and
trend of forest condition is essential to support reporting processes at national and international level. An international forest condition monitoring has been implemented in Europe since 1987 under the auspices
of the International Co-operative Programme on Assessment and Monitoring of Air Pollution Effects on Forests (ICP Forests). The monitoring is based on harmonized methodologies, with individual countries being responsible for its implementation. Due to inconsis-
tencies and problems in sampling design, however, the ICP
Forests network is not able to produce reliable quantitative
estimates of forest condition at European and sometimes at
country level. This paper proposes (1) a set of requirements
for status and change assessment and (2) a harmonized
sampling strategy able to provide unbiased and consistent
estimators of forest condition parameters and of their changes at both country and European level. Under the assumption that a common definition of forest holds among European countries, monitoring objectives, parameters of concern and accuracy indexes are stated. On the basis of fixed-area plot sampling performed independently in each country, an unbiased and consistent estimator of forest defoliation indexes is obtained at both country and European level, together with conservative estimators of their sampling variance and power in the detection of changes. The strategy adopts a probabilistic sampling scheme based on fixed-area plots selected by means of systematic or stratified schemes. Operative guidelines for its application are provided.
Description: L'articolo è diponibile sul sito dell'editore www.springerlink.com2012-12-31T23:00:00ZK-NN FOREST: a software for the non-parametric prediction and mapping of environmental variables by the k-Nearest Neighbors algorithmChirici, GherardoCorona, PiermariaMarchetti, MarcoMastronardi, AlessandroMaselli, FabioBottai, LorenzoTravaglini, Davidehttp://hdl.handle.net/2067/23332013-01-11T00:05:09Z2011-12-31T23:00:00ZTitle: K-NN FOREST: a software for the non-parametric prediction and mapping of environmental variables by the k-Nearest Neighbors algorithm
Authors: Chirici, Gherardo; Corona, Piermaria; Marchetti, Marco; Mastronardi, Alessandro; Maselli, Fabio; Bottai, Lorenzo; Travaglini, Davide
Abstract: In the last decades researchers investigated the possibility of extending the information collected in sampling units during a field survey to wider geographical areas through the use of remotely sensed images. One of the most widely adopted approaches is based on the non-parametric k-Nearest Neighbors (k-NN) algorithm. This contribution describes the software K-NN FOREST we developed to provide a complete tool for the implementation of the k-NN technique to generate spatially explicit estimations (maps) of a response variable acquired in the field by sampling units through the use of remotely sensed data or other ancillary variables. K-NN FOREST is designed to guide the user through a graphic user interface in the different phases of the process. K-NN FOREST is freely available for download and it is designed to run under Windows environment in conjunction with the GIS software IDRISI.2011-12-31T23:00:00ZPotenzialità del telerilevamento laser scanner aereo per la classificazione delle coperture forestali in funzione della forma di governoTravaglini, DavideBottalico, FrancescaChirici, GherardoCorona, PiermariaNocentini, Susannahttp://hdl.handle.net/2067/23402013-02-08T00:05:28Z2011-12-31T23:00:00ZTitle: Potenzialità del telerilevamento laser scanner aereo per la classificazione delle coperture forestali in funzione della forma di governo
Authors: Travaglini, Davide; Bottalico, Francesca; Chirici, Gherardo; Corona, Piermaria; Nocentini, Susanna
Abstract: In questo studio è stata valutata la potenzialità del telerilevamento laser scanner aereo (ALS) per
classificare le forme di governo forestale in un bosco misto di latifoglie. La metodologia applicata
prevede l’utilizzo del modello digitale delle chiome (CHM) ottenuto da dati ALS e l’impiego di
procedure automatizzate per la segmentazione object-oriented delle immagini telerilevate. La
classificazione delle forme di governo si basa sulle metriche estratte dal CHM. I risultati ottenuti
indicano che la media delle altezze e il coefficiente di variazione delle altezze estratti dal CHM
sono utili per distinguere i boschi governati a ceduo da quelli governati a fustaia; In this study aerial laser scanning (ALS) data has been tested to classify coppice stands and high
forest stands in a mixed broadleaved forest. The method is based on a canopy height model (CHM)
obtained from ALS data. Forest stands have been delineated using a object-oriented approach. The
polygons have been classified into coppices and high forests based on the metrics derived from
CHM. Our results indicate that the mean of the heights and the coefficient of variation of the
heights extracted from CHM are useful to discriminate coppices from high forests.
Description: L'articolo è disponibile sul sito dell'editore www.asita.it2011-12-31T23:00:00ZClassifying silvicultural systems (coppices vs. high forests) in Mediterranean oak forests by Airborne Laser Scanning dataBottalico, FrancescaTravaglini, DavideChirici, GherardoMarchetti, MarcoMarchi, EnricoNocentini, SusannaCorona, Piermariahttp://hdl.handle.net/2067/26312014-09-04T23:05:37Z2013-12-31T23:00:00ZTitle: Classifying silvicultural systems (coppices vs. high forests) in Mediterranean oak forests by Airborne Laser Scanning data
Authors: Bottalico, Francesca; Travaglini, Davide; Chirici, Gherardo; Marchetti, Marco; Marchi, Enrico; Nocentini, Susanna; Corona, Piermaria
Abstract: Forest classification by silvicultural systems (coppices vs. high forests) is important for forest resource assessment as such systems relate to a wide variety of ecosystem services. In this paper the potential of Airborne Laser Scanning (ALS) data for Mediterranean oak forests classification of coppices with standards vs. high forests was investigated in three study areas in Italy. We addressed the following issues: can coppices and high forests be distinguished using a raster Canopy Height Model (CHM)? Which are the most efficient CHM-derived metrics? Does the scale of analysis influence the classification potential of CHM metrics? Our results show that CHM in grid format (1-m2 pixel) provides support information to classify silvicultural systems.2013-12-31T23:00:00ZLarge-scale pan-european forest monitoring network: A statistical perspective for designing and combining country estimates. Example for defoliationTravaglini, DavideChirici, GherardoBottalico, FrancescaFerretti, MarcoCorona, PiermariaBarbati, AnnaFattorini, Lorenzohttp://hdl.handle.net/2067/26432014-09-22T23:05:47Z2012-12-31T23:00:00ZTitle: Large-scale pan-european forest monitoring network: A statistical perspective for designing and combining country estimates. Example for defoliation
Authors: Travaglini, Davide; Chirici, Gherardo; Bottalico, Francesca; Ferretti, Marco; Corona, Piermaria; Barbati, Anna; Fattorini, Lorenzo
Abstract: -2012-12-31T23:00:00ZDead wood and stand structure - relationships for forest plots across EuropeSeidling, WalterTravaglini, DavideMeyer, PeterWaldner, PeterFischer, RichardGranke, OliverChirici, GherardoCorona, Piermariahttp://hdl.handle.net/2067/26392014-09-22T23:05:47Z2013-12-31T23:00:00ZTitle: Dead wood and stand structure - relationships for forest plots across Europe
Authors: Seidling, Walter; Travaglini, Davide; Meyer, Peter; Waldner, Peter; Fischer, Richard; Granke, Oliver; Chirici, Gherardo; Corona, Piermaria
Abstract: Dead wood and stand structural parameters were sampled in eleven countries using standardized methods at about 90 intensive forest monitoring sites across large parts of Europe. Besides descriptions and correlation analyses of dead wood and stand structure parameters, a joint evaluation of both fields
was performed by principal component analysis (PCA). The extracted principal components were subsequently regressed against important numerical and categorical site-related parameters like soil pH, altitude, or forest type. Dead wood volumes varied largely across plots, however, 77 percent of them had
volumes below 25 cubic meter per hectare. While all fractions of dead wood - except cut stumps - reveal high intercorrelation, different aspects of stand structure varied more independently. Clark-Evans index, number of tree species and standard deviation of tree trunk diameters revealed as most selfcontained.
The 1st PCA axis covered 46 percent of the total variance and was
mostly loaded by total dead wood volume denoting it as the feature differentiating
forests most. The 2nd axis was primarily loaded by tree species diversity
together with stem density and the Clark-Evans index. On the 3rd axis diameter
differentiation of trees together with the volume of cut stumps prevailed,
while the 4th was mainly related to the decay class of woody debris. Bivariate ex post analyses revealed country as a significant predictor of all PCA axes, underlining
national forest legislations and management rules as crucial for all investigated
structural features of forests. Forest type was related only to the 3rd and 2nd axis. Only the 3rd axis revealed significant relationships with some ecological
site factors (age, number of tree layers, latitude, altitude). The outcome underlines the significance of nationally enacted forest legislations for both important structural and biodiversity-relevant features of forest ecosystems and encourages similar approaches with data from national forest inventories
or monitoring systems.2013-12-31T23:00:00Z